Pyrotechnic composition



Patented Mar. 17, 1936 I v UNITED STATES PATENT OFFICE No Drawing. Application September 15, 1933, Serial No. 659,600

4 Claims. (on. 52-24) (Granted 'under the act of March 3, 1883, as

amended April 30, 1928; 370 O. G. 757) The invention described hereinmay be manu- Per cent factured and used by or for the Government for Magnesium-aluminum alloy of equal parts 52 '7 overnmental purposes, without the payment to Barium nitrate.. 4 me t any royalty thereon. Castor oil 1 5 5 ninventlon relates to pyrotechnic The proportions of the ingredients entering into the formation of the alloy may be varied to .pymtgghmc composmons magPeslm and suit the'convenience of cost and availability of ammmum. are employed separg'tely or together supply. "Even when the proportions are at the 9 functlon as fuels or redmmg agents one greatest extremes, the ingredients will be more 10 10 dlsa'dfantage at.tendant upon use in stable when first formed into an alloy than they tePhmc P is that they are assmmed will be it introduced separately into the comwith oxidizing agents in whose presence they position are readily oxidized during storage. They are also readily oxidized in the presence of mots g g mggfi f ggf giflfigfigfi f, 15 ture.

r magnesium-zinc and aluminum-zinc.

The usual practice intended to obviate this dif- In compositions intended t0 give a green c0101. ficulty m cfmtmg the magnesium and employing an oxidizing agent having that aluminum with or waxy. Substance for color characteristic inburning, I have found that example, parafline. This protection is only partially efiective as the metals will be oxidized on magnesium-copper alloy Wm produce excellent 20 resultsastheco ru nburnin vesofia prolonged storage. In addition this practice is ppe m g green color. open to the objection that it incorporates an I claim: inert substance in the pyrotechnic composiv A pyrotechnic composition comprising a F tion' oxidizing agent and particles of an alloy of two 1 have d that if the Ina-8119511111.! reducing agents one of which is silicon and the aluminum is embodied in an alloy before being other of which is of the group magnesium-alumireduced to small particles or powdered form they mum ay be included in fl-pyrotechnic composition 2. A pyrotechnic composition comprising an without becoming subject to oxidation and they oxidizing agent and partic1 of an alloy of t 30 will retain all their desirable properties and charreducing agents one of which 13 Zinc and t acteristics. other of which is of the group magnesium-alumi- As an example an alloy of equal parts of magmun, nesium and aluminum was ground into powdered 3. A pyrotechnic composition comprising an' form and exposed to the weather for a period of oxidizing agent and particles of an alloy of magthree months without becoming oxidized or denesium and copper. teriorated. When placed in pyrotechnic compo- 4. A pyrotechnic composition comprising an sitions it was found to be stable and fulfilled all oxidizing agent and particles of an alloy of two requirements in functioning. v reducing agents one of which is of the group The following formula. is representative and copper-silicon-zinc and the other of which is of 40 40 suits the required conditions of candlepower and the group magnesium-aluminum.

time Of burning. SAMUEL WILEY. 

